Hi Alex > -----Original Message----- > From: Alexander Graf [mailto:[email protected]] > Sent: Monday, April 23, 2018 11:25 AM > To: Udit Kumar <[email protected]> > Cc: Rod Dorris <[email protected]>; [email protected]; > [email protected]; [email protected] > Subject: Re: [Arm.ebbr-discuss] EBBR weekly meeting in 1/2 hour > > Hi Udit, > > > Am 23.04.2018 um 07:15 schrieb Udit Kumar <[email protected]>: > > > > Hi Alex, > > > > I was reading your notes for DT management > > > >> Alex: Have logic in firmware that can enumerate "Hat"s and create EFI > >> object > for them. These objects could then be backed by DTBOs - either by grabbing > them from the device (EEPROM) or by a stored blob in firmware. >Grub for > example could then also be taught about these objects and DTBO support, so an > OS could store its own overlays. EDK2 has the hat logic support today and > already does create objects. > > > > I am not sure, where you want to store DTBO in EEPROM or on some other > partition/media. > > If this is EEPROM then I hope firmware is stored on this as well. Then we > shouldn't expose EEPROM to OS. > > There are hats that provide device tree overlays as part of their self > description, > such as the beagle ones. That‘s what I was referring to. > > Of course the actual hat driver again can override or self define a dtbo as > well.
I don’t know much about beagle and cape-manager . But looks there is dedicated driver handling these. IMO, all the overlays should be applied by boot-loader however kernel can write to agreed location, it could be runtime variable, some partition > > Alex > > > > > Regards > > Udit > > > >> -----Original Message----- > >> From: [email protected] [mailto:arm.ebbr-discuss- > >> [email protected]] On Behalf Of Grant Likely > >> Sent: Thursday, April 19, 2018 8:29 PM > >> To: arm.ebbr-discuss <[email protected]>; boot- > >> [email protected]; [email protected] > >> Subject: [Arm.ebbr-discuss] EBBR weekly meeting in 1/2 hour > >> > >> Hi folks, > >> > >> Weekly EBBR meeting starts in about 1/2 hour. Dial in details below. > >> Once again the agenda is very short, but I'll open it up to other > >> topics after action item review. I think there was some interest in > >> talking about DT overlay handling. > >> > >> Notes are being captured in the following Google doc. I would greatly > >> appreciate help with taking meeting minutes. > >> > >> https://emea01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdo > >> cs.g > oogle.com%2Fdocument%2Fd%2F1RdlFp5SIrvjcVOGoGEFVYDsqTqFBJHugbBMV > >> > 5MuXUhw%2Fedit%3Fusp%3Dsharing&data=02%7C01%7Cudit.kumar%40nxp.co > >> > m%7C3eb61599b18a412b892508d5a6062f3f%7C686ea1d3bc2b4c6fa92cd99c5c > >> > 301635%7C0%7C0%7C636597467908843944&sdata=WXyC196CqdpvkQYGtG6Ir > >> P0uHPDNTyPA65LM4jfvJXc%3D&reserved=0 > >> > >> Agenda: > >> 1) Action item review > >> 2) Any other business > >> > >> Cheers, > >> g. > >> > >> > >> Time: Every Thursday at 16:30-17:30 BST (8:30 PDT, 23:30 CST) Join by > >> Phone > >> +44 2033215213,, 4664465# > >> > >> --- > >> > >> Join online meeting > >> https://emea01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fme > >> et.l > >> > ync.com%2Farmh%2Fgrant.likely%2FYBY93TIK&data=02%7C01%7Cudit.kumar% > >> > 40nxp.com%7C3eb61599b18a412b892508d5a6062f3f%7C686ea1d3bc2b4c6fa9 > >> > 2cd99c5c301635%7C0%7C0%7C636597467908843944&sdata=aFRlW1xGKXR2V > >> hnYEZO%2FFClBt6x8TDd3LVJohERHbmw%3D&reserved=0 > >> > >> Trouble Joining? Try Skype Web App > >> https://emea01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fme > >> et.l > >> > ync.com%2Farmh%2Fgrant.likely%2FYBY93TIK%3Fsl%3D1&data=02%7C01%7Cu > >> > dit.kumar%40nxp.com%7C3eb61599b18a412b892508d5a6062f3f%7C686ea1d3 > >> > bc2b4c6fa92cd99c5c301635%7C0%7C0%7C636597467908843944&sdata=fSofD > >> UE97VolIL9%2BwcyE00mV4Av07Muc96GKHGawRC0%3D&reserved=0 > >> > >> Join by Phone +44 2033215213,, 4664465# > >> > >> Find a local number > >> https://emea01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdi > >> alin.l > >> ync.com%2F7bdb65cd-97d0-44fe-bc03- > >> > bf8072eadc33&data=02%7C01%7Cudit.kumar%40nxp.com%7C3eb61599b18a4 > >> > 12b892508d5a6062f3f%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7 > >> > C636597467908843944&sdata=wQoMC8nocRjcsJrKxZBlXQoJZJRJAZJr40AB%2Fy > >> x8Hec%3D&reserved=0 > >> Conference ID: 4664465 > >> IMPORTANT NOTICE: The contents of this email and any attachments are > >> confidential and may also be privileged. If you are not the intended > >> recipient, please notify the sender immediately and do not disclose > >> the contents to any other person, use it for any purpose, or store or > >> copy the information in any medium. Thank you. > >> _______________________________________________ > >> Arm.ebbr-discuss mailing list > >> [email protected] _______________________________________________ boot-architecture mailing list [email protected] https://lists.linaro.org/mailman/listinfo/boot-architecture
